Machine for making nut-locks



(No Modl.) 2 Sheets-Sheet 1. W. DUNN. MACHINE FOR MAKING NUT LOGKS.

No. 397,840,. Patented Feb. 12. 1889.

"mull Mil WITNESSES:

INVENTOR: M aOZVfl/fu W Mr- ATTORNEYS.

(No Model.) 2 sheets-sheet 2.

W. DUNN. MACHINE FOR MAKING NUT LOOKS. 'No. 397,840. Patented Feb. 12, 1889.

I mh W IlNiTnn STATES PATENT @rrren.

\YILLIAM DUNN, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR MAKING NUT-LOCKS.

SPECIFICATION forming part of Letters Patent No. 397,840, dated February 12, 11889. Application filed October 31, 1888. Serial No. 289,625. (No model.)

To all whom it may concern-.-

Be it known that 1, WILLIAM DUNN,a citizen of the United States, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Machines for Making Nut Locks, of which the following is a specification.

I In Letters Patent of the United States No. 382,078, granted May 1, 1888, there is shown described and claimed a nut fastener invented by me, the said nut fastener consisting of a single strip of material having one end coiled, forming a spring and an eye, and the other end portion bent around the said eye, and having a spring portion adjacent to the said eye, the ends of the fastener being set out in opposite directions.

The object of my present invention is the construction of a machine for making such nut fasteners which shall be simple in parts,

efficient in operation, and shall require the minimum amount of manual assistance in its running.

In the drawings, Figure 1 represents a partial top or plan view of a machine for making nut fasteners, embodying my invention. Fig. 2 represents a top or plan view of a detached portion thereof. Fig. 3 represents a top or plan view of another detached portion thereof. Fig. i represents a side elevation of the stand A, a portion of the edge of said Opening, in the vicinity of the fulcrum b, being formed as an arc of a circle concentric with said fulcrum.

O is an upright stud, securely mounted upon the lever B, and projecting through the opening D,its position upon the lever B being such that in the swing of said lever it sweeps the concentric edge of the opening D.

G is a spring latch, mounted at one side of the machine, the nose of which is adapted to engage and retain the lever Bwhen the latter is swung to the position represented in dotted lines in Fig. l.

H is a lever mounted in a suitable bearing 72., as shown in Fig. 4, the inner end of which is connected to the outer end of the spring latch G, so that the lifting of the handle of said lever depresses the spring latch G, and releases the lever B, and permits it to be swung back to the position shown in full lines in Fig. l.

E E are fixed studs, pins, or kindred devices, secured to the table in the relative positions shown in the drawings.

A is a supporting bracket, mounted upon the table A and designed to maintain the parts of the apparatus hereinafter described.

K is a pivot of suitable size and strength, mounted for rotation in an extension of the bracket A. To the upper end of the pivot is attached conveniently by means of a collar and set screw shown in the drawings, a handle J.

j is a spring bar embodying a seat for the lever J whereby it may be temporarily retained in the position shown in Fig. 4..

J is a stop intended to limit the swing of the handle J. To the lower end of the pivot K is firmly secured so as to turn therewith a projecting arm L. To the arm L at a pointnear its outer extremity is attached a depending arm M, at its lower end provided with a finger N.

Q is an extension of the bracket A, eonveniently made of the form and placed in the situation represented in the draw ings, in which is mounted a pivot q, upon the lower end of which is mounted free for rotary movement a projecting arm P. To the arm P at a point near its outer extremity is attached a depending arm S, at its lower end provided with a finger '1.

R is a link the ends of which are pivotally attached to the outer extremities of the respective arms L and P. 7

It will be understood that upon the movei ofnearly half a circle (the plane of which is,

ment of the handle J in the direction of the arrow in Fig. 3, the pivot K will be rotated, the arm L be swung and its depending arm and finger be caused to describe the arc of a circle concentric with respect to the pivot K. hen the arm I1 is thus moved, it, by means of the link R, draws after it the arm P, and causes the depending arm and finger of said arm P to describe the arc of a circle concentric with the pivot q of the extension Q, but I eccentric with regard to the circle described or partially described by the finger N, (as shown by the arrows of Fig. l.) The pivots K and q, and the depending arms M. and S are not vertical, but are all set at a common slight inclination, as shown in the drawings, by tilting the supporting bracket A. The result of this construction is of course that the arcs described by the fingers T and N do not lie in horizontal but in inclined planes. It is apparent that, referring to Fig. l, the further outward to the left said fingers are, the greater will be their elevation, and that as they travel to the right they will gradually descend. F is a gage mounted upon the table A.

The operation of the machine is as follows: i The blank, which is a straight bar or rod of steel, is heated and inserted between the studs E E, with one end resting on the gage F. The lever B (Fig. 4) is then swung to the right, the stud (l encountering the outer half of the blank, bends it around the stud E the other end of the blank is held in position by the stud E. The lever 13 having reached the limit of its movement, becomes engaged behind the nose of the spring arm G, and remains there during the remainder of theoperation of forming a nut fastener. As shown in Fig. 1, the ends of the now V-shaped blank lie immediately in front of the fingers N and T respectively, while in front of both now lies the stud C. Thehandle J (Fig. 3) being swung to the left, the fingers N and T move in their paths as illustrated in Fig. 1, carrying in front of them the extremities of the'V-shaped blank and in their travel both fingers approach and travel partlyaround the stud G, causing the legs of the blank to encircle said stud whereby a nut fastener of the profile shown in Fig. 6 is formed. The finger N describes an arc of approximately half a circle (the'plane of which circle is as hereinbefore explained inclined) and as it is, when it starts, ina posit-ion about midway between the upper and lower ends of the inclined plane, it therefore in traveling such halfcircle descends and then ascends, carrying with it one member of the heated malleable blank, so that the end 6, (Fig. (i) of thefinished nut fastener is elevated above the other parts of saidfastener. The finger '1 describes an are as is hereinbefore explained, inclined.) Said finger is, when it starts, in: its position of greatest elevation, it therefore, in describing its half circle, descends until it is, when it stops, in its lowest position, and carries with,

it the other member of the heated malleable blank, with the result that said end f, (Fig. (5) of the finished nut fastener is depressed below the plane of the other parts of the fastener.

lslavin-g thus described my invention, I claim and desire to secure by Letters Patent:

1. In a machine for making nut fasteners, in combination, a supporting table, a stud provided with a swinging lever, means for bold ing a blank in such position that it lies in the path of said stud, fingers each adapted to travel in an independent path and so situated as to each operate upon one of the'respcctive ends of the blank, a link connecting said fingers, and a handle adapted to operate said fingers, substantially as set forth.

2. In a machine for making nut fasteners, in combination, a supporting table, stationary studs adapted to hold a blank between them, a lever, a stud mounted thereupon, swinging arms mounted upon independent axes, fingers attached to said arms each adapted to when the stud is in its innermost position move partly around the same, in

planes inclined to the horizon, and in paths eccentric both with respect to said stud-and to each other, a link connecting said swinging arms, and a handle mounted. in connection therewith, substantially as set forth.

In a machine for making nut fasteners, in combination, a supporting table, station ary studs, which lie 011 opposite sides of a blank fed to the machine, a movable stud adapted when in its outer position to lie adjacentto the free end of a straight blank fed to the machine, and, when in its inner position, to lie adjacent to the blank when said blank has been bent to a V-shape, a lever arm upon which said movable stud is mounted, and means for bending the extremities of the blank about said movable stud, substantially as set forth.

In a machine for making nut fasteners, in combination, a supporting-table, a station ary stud adapted to lie adjacent to one side and near the center of a blank fed to the machine, a retaining device adapted to lie adjacent to the opposite side of the blank, a movable stud the path of travel of which intersects the blank fed to the machine, lever arm upon which said movable stud is mount ed, a pivot beneath the table for said lever arm, an opening in said table through which. said movable stud projects, and means for bending the extremities of the blank about said movable stud, substantially as'set forth.

5. In a machine for making nutfasteners, in combination, a supporting table, a movable stud, a lever arm uponwhich said stud is mounted, projecting arms, mounted-ripenindependent axes, an arm and a finger depending from each of said projecting arms, a link connecting the projecting arms, and a lever handle attached to one of said arms or its axis, substantially as set forth.

6. In a machine for making nut fasteners,

in combination, a supporting table, a movable stud, a lever arm upon which said stud is mounted, projecting arms mounted upon independent inclined axes, an arm and afinger depending from each of said projecting arms, a link by which the projecting arms are coupled, and a lever by which they are rotated, substantially as set forth.

7. In a machine for making nut locks, in combination, a supporting table, a movable stud, a lever arm upon which said stud is mounted, arms mounted upon independent inclined axes in such position that they overhang the-point occupied by the stud when it is moved in to its innermost position, an arm and a finger depending from each projecting arm, and a lever arm connected to the axis of one of said arms, substantially as set forth.

8. In combination with the lever B and the stud mounted thereupon, the latch, and latch operating handle, substantially as set forth.

9. In a machine for making nut locks, in combination, a projecting arm mounted upon an inclined axis, a projecting arm mounted upon a separate inclined axis, depending arms and fingers attached to said arms, a link connecting said projecting arms, and a lever handle connected to one of said axes, substantially as set forth.

10. In a machine for making nut locks, in combination, a PlOjGClllllg arm mounted upon an inclined axis, a projecting arm mounted upon a separate inclined axis, depending arms and fingers attached to said arms, a link connecting said projecting arms, a lever handle connected to one of said axes, the arrangement being such that upon the throw of the handle said fin gers are caused to describe arcs of circles in planes inclined to the horizon, substantially as set forth.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 22d day of October, A. D. 1888.

WILLIAM DUNN. 

